Support structure



FIG. 1 is a first perspective view of the design with the arms at an angled orientation.

FIG. 2 is a second perspective view of FIG. 1.

FIG. 3 is a left side elevation view of FIG. 1.

FIG. 4 is a right side elevation view of FIG. 1.

FIG. 5 is a rear elevation view of FIG. 1.

FIG. 6 is a front elevation view of FIG. 1.

FIG. 7 is a top plan view of FIG. 1 with the arms at a straight orientation; and,

FIG. 8 is a bottom plan view of FIG. 1 with the arms at a straight orientation.

The broken lines show portions of the support structure that form no part of the claimed design. 

CLAIM The ornamental design for a support structure, as shown and described. 